NIKE Men&rsquo;s Dri-Fit &frac12; Zip Vest Body: 100% Polyester. Dri-Fit fabric to wick away sweat and help keep you dry and comfortable Mock neck zips up to the chin for warmth Mesh lining in collar for breathability Stretch shoulder panels and wide armholes for non-restrictive comfort, brushed interior for a soft, warm feel Fabric  Body: Dri-Fit 100% Polyester. Panels: Dri-Fit 90% Polyester/10% Elastane. Mesh: 100% Polyester